US4666175A - Bicycle frame with asymmetric chain stay for performing freestyle maneuvers - Google Patents
Bicycle frame with asymmetric chain stay for performing freestyle maneuvers Download PDFInfo
- Publication number
- US4666175A US4666175A US06/866,794 US86679486A US4666175A US 4666175 A US4666175 A US 4666175A US 86679486 A US86679486 A US 86679486A US 4666175 A US4666175 A US 4666175A
- Authority
- US
- United States
- Prior art keywords
- tube
- chain stay
- seat
- secured
- tubes
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
- B62K3/00—Bicycles
- B62K3/02—Frames
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
- B62J25/00—Foot-rests; Knee grips; Passenger hand-grips
- B62J25/06—Bar-type foot rests
Definitions
- This invention relates to a special kind of sports bicycle called a BMX or Freestyle bike.
- BMX or Freestyle bike typically, these have a low profile with wheel diameters of 20 inches or less and are extremely rugged. They are used for sprinting, racing, and a wide variety of trick maneuvers, such as climbing an inclined ramp and dropping to a track below, riding or balancing the bike while tilted upright on its rear wheel, riding or coasting while seated or standing on the handlebar cross-bar, or with the rider's feet or hands supported on tires, handlebars, and various frame portions which may be added as accessories or provided as integral original parts of the frame.
- some front forks have horizontal stub shafts.
- a step-like rear extension of the top tube provides a standing platform beneath the seat in some of these bikes.
- Bolted standing platforms are provided as add-on accessories which may be secured to one or both ends of the rear axle or to the end portions of the chain stay tubes.
- One favorite standing platform for freestyle performers is provided at the top of the seat stay tubes just behind and below the seat.
- the rear caliper brake typically is secured to the top of a bridge interconnecting the seat stay tubes at that location the upstanding brake and its actuating cable can interfere with the performer's feet and severely limit the standing space available.
- Examples of attempts to provide uncluttered, standing room behind and below the seat include providing a relatively free standing area on the seat stay tubes between the rear brake and the seat mast as shown in the GT Pro Series and Redline BMX bikes illustrated on pages 6, 7, and 8, 9 of the March, 1986 BMX Action Magazine.
- a general object of the present invention is to provide a plurality of unique standing platforms on a BMX or Freestyle type bicycle to facilitate performing freestyle maneuvers.
- One object of the invention is to secure the rear caliper brake on the underside of the chain stay tubes, instead of at the conventional location on the upperside of the seat stay tubes, and provide a footstep or standing platfom across the tops of the seat stay tubes below the seat which is freely accessible to a freestyle performer's foot from either side, to avoid any possible entanglement with the caliper brake arms or the rake actuating cable.
- Another object is to provide a bicycle frame in which the rear caliper brake is secured across the underside of the chain stay tubes and the chain stay tubes have asymmetric configurations with the front portions of one curving or bulging outwardly sufficiently to provide a foot-engagable step or standing platform which overhangs the corresponding brake actuating arm and protects the arm from pressure by the rider's foot.
- Another object is to provide such a bicycle frame in which the rear end portions of the chain stay tubes extend laterally outwardly around the ends of the rear exle to provide a pair a foot-supporting step on either side for supporting the feet during freestyle maneuvers.
- Another object is to secure a diagonal tube between the down and seat tubes to provide an additional standing platform for performing freestyle maneuvers.
- FIG. 3 is a fragmentary, enlarged bottom view of FIG. 1 taken in the direction of arrows 3--3;
- one favorite stading platform for freestyle performers is on the seat stay tubes at the location 36 just behind the seat tube 26.
- this location is not completely free because the rear caliper brake is on the upper side of the seat stay tubes as shown in broken lines at 38 in FIG. 1. It can be distracting and even dangerous for a rider to keep his or her feet from becoming entangled with the brake or brake actuating cable while performing freestyle maneuvers.
- the caliper brake 40 has in effect been moved from the location 38 to the underside of the chain stay tubes as shown in solid lines in Fig. 1 where it is secured in the usual manner by a center bolt 42 (FIG. 3) extending through a bridge 44 welded or brazed between the chain stay tubes 32,32a.
- This provides a completely free and uncluttered standing platform at position 36 at the top end portions of the seat stay tubes.
- An upwardly arched cross tube 44 is welded or brazed across the seat tubes to provide an additional step as well as a rear margin for the stepping platform at location 36.
- the caliper brake 40 may be of the conventional type having a pair of brake shoes 46,46 fastened by bolts 47,47 and engagable with opposite side surfaces 48,48 of the rear wheel rim. Springs (not shown) urge brake-shoe-carrying arms 50,50 apart to normally disengage the shoes from the rim. At the opposite ends of the brake arms 50,50, brake actuating arms 52,52 are engagable by a yoke (not shown) connected to a cable (not shown) extending through guide 54 on the underside of the bottom bracket shell 28. Pulling on the cable (left-wise in FIG. 3) squeezes the brake shoes 46,46 into frictional engagement with the sides of the wheel rim.
- crank arm assembly 56 with cranks 57, pedals 59 and center shaft 61, is shown in broken lines and will be journaled in the usual way for rotation within the bottom bracket 28.
- a drive sprocket 58 is conventionally located on the right hand side.
- Another favorite standing platform for freestyle performers is the forward step portion 62 on the left hand chain stay tube 32, opposite the drive sprocket 58. This step is immediately above the brake arm 52 location as shown in FIGS. 1 and 3.
- the chain stay tubes 32,32a are asymmetric. This is an important feature of the present invention.
- the forward step portion 62 of the left hand chain stay tube, opposite the drive sprocket 58, is bulged or curved outwardly immediately behind the bottom bracket shell 28, relative to the centerline X--X of the frame, more than the corresponding forward portion 62a of the right hand chain stay tube.
- the portion 62 completely overhangs the end of the left hand end of the brake actuating arm 52 thereby positively preventing accidental engagement and interference with the brake arm by the performer's foot, even if his foot slips off the chain stay tube during maneuvers.
- That outwardly bulged configuration 62 of the chain stay tube is not desired or even possible on the right hand side because it would interfere with the space required by the sprocket 58.
- Still other favorite standing platforms for freestyle performers are at the rear axles.
- a pair of special, rear fork end dropout fitments 34,34 provide permanent, wide standing platforms at opposite ends of the rear axle and do not interfere with or limit fore and aft adjusttment of the rear axle. They are slightly above the rear axle, allowing ready access to the rear axle nut (not shown).
- a diagonal tube 74 is secured by welding or brazing between the down tube 24 and seat tube or mast 26 to provide an additional step or standing platform for freestyle maneuvers.
Abstract
Description
Claims (7)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/866,794 US4666175A (en) | 1986-05-23 | 1986-05-23 | Bicycle frame with asymmetric chain stay for performing freestyle maneuvers |
US07/042,280 US4733881A (en) | 1986-05-23 | 1987-04-23 | Bicycle frame with supplemental step or platform for performing freestyle maneuvers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/866,794 US4666175A (en) | 1986-05-23 | 1986-05-23 | Bicycle frame with asymmetric chain stay for performing freestyle maneuvers |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US07/042,280 Division US4733881A (en) | 1986-05-23 | 1987-04-23 | Bicycle frame with supplemental step or platform for performing freestyle maneuvers |
Publications (1)
Publication Number | Publication Date |
---|---|
US4666175A true US4666175A (en) | 1987-05-19 |
Family
ID=25348430
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US06/866,794 Expired - Fee Related US4666175A (en) | 1986-05-23 | 1986-05-23 | Bicycle frame with asymmetric chain stay for performing freestyle maneuvers |
Country Status (1)
Country | Link |
---|---|
US (1) | US4666175A (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4813696A (en) * | 1987-04-15 | 1989-03-21 | Alex Moulton Limited | Bicycle frame construction |
US4934705A (en) * | 1989-04-03 | 1990-06-19 | American Communication Services, Inc. | Golf course playing apparatus |
US5012900A (en) * | 1989-05-17 | 1991-05-07 | Bridgestone Cycle Co., Ltd. | Brake for bicycle |
US5211415A (en) * | 1990-09-28 | 1993-05-18 | Gasiorowski Roman J | Bicycle frame with channel member |
DE4205394A1 (en) * | 1992-02-22 | 1993-08-26 | Framework Fahrradbau Gmbh | Frame for bicycle with fixed rim brake - has triangular rear structure with a horizontal lower lowerable fork at the end of which rear wheel is fixed |
US20040075238A1 (en) * | 2002-10-17 | 2004-04-22 | Speegle John Charles | Sliding foot for freestyle bicycle riding |
US20090230654A1 (en) * | 2008-03-11 | 2009-09-17 | Honda Motor Co., Ltd. | Rear portion structure of a vehicle body for a saddle-type vehicle |
US8820764B2 (en) | 2012-03-13 | 2014-09-02 | Robert M Deily | Bicycle frame |
USD911225S1 (en) * | 2018-07-02 | 2021-02-23 | Super 73, Inc. | Chain stay |
USD1009715S1 (en) | 2021-07-21 | 2024-01-02 | Specialized Bicycle Components, Inc. | Bicycle frame |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US519579A (en) * | 1894-05-08 | Step for bicycles | ||
US593678A (en) * | 1897-11-16 | Coasting foot-rest for bicycles | ||
US2491379A (en) * | 1947-03-12 | 1949-12-13 | Murray Ohio Mfg Co | Seat post cluster structure for bicycles |
US3773355A (en) * | 1971-06-18 | 1973-11-20 | C Swartz | Bicycle passenger foot support |
US4335876A (en) * | 1980-05-27 | 1982-06-22 | Westernoff W Gary | Jousting game |
-
1986
- 1986-05-23 US US06/866,794 patent/US4666175A/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US519579A (en) * | 1894-05-08 | Step for bicycles | ||
US593678A (en) * | 1897-11-16 | Coasting foot-rest for bicycles | ||
US2491379A (en) * | 1947-03-12 | 1949-12-13 | Murray Ohio Mfg Co | Seat post cluster structure for bicycles |
US3773355A (en) * | 1971-06-18 | 1973-11-20 | C Swartz | Bicycle passenger foot support |
US4335876A (en) * | 1980-05-27 | 1982-06-22 | Westernoff W Gary | Jousting game |
Non-Patent Citations (7)
Title |
---|
BMX Action Magazine, May, 1986, p. 60. * |
Freestyle Magazine, Apr. 1986, pp. 32 35. * |
Freestyle Magazine, Apr. 1986, pp. 32-35. |
Freestylin Magazine, Jun., 1986, pp. 4, 47, 52. * |
Freestylin' Magazine, Jun., 1986, pp. 4, 47, 52. |
Freestylin Magazine, May, 1986, pp. 8 and 9, 11, 16 and 17, 33 and 60. * |
Freestylin' Magazine, May, 1986, pp. 8 and 9, 11, 16 and 17, 33 and 60. |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4813696A (en) * | 1987-04-15 | 1989-03-21 | Alex Moulton Limited | Bicycle frame construction |
US4934705A (en) * | 1989-04-03 | 1990-06-19 | American Communication Services, Inc. | Golf course playing apparatus |
US5012900A (en) * | 1989-05-17 | 1991-05-07 | Bridgestone Cycle Co., Ltd. | Brake for bicycle |
US5211415A (en) * | 1990-09-28 | 1993-05-18 | Gasiorowski Roman J | Bicycle frame with channel member |
DE4205394A1 (en) * | 1992-02-22 | 1993-08-26 | Framework Fahrradbau Gmbh | Frame for bicycle with fixed rim brake - has triangular rear structure with a horizontal lower lowerable fork at the end of which rear wheel is fixed |
US20040075238A1 (en) * | 2002-10-17 | 2004-04-22 | Speegle John Charles | Sliding foot for freestyle bicycle riding |
US20090230654A1 (en) * | 2008-03-11 | 2009-09-17 | Honda Motor Co., Ltd. | Rear portion structure of a vehicle body for a saddle-type vehicle |
US7780181B2 (en) * | 2008-03-11 | 2010-08-24 | Honda Motor Co., Ltd. | Rear portion structure of a vehicle body for a saddle-type vehicle |
US8820764B2 (en) | 2012-03-13 | 2014-09-02 | Robert M Deily | Bicycle frame |
USD911225S1 (en) * | 2018-07-02 | 2021-02-23 | Super 73, Inc. | Chain stay |
USD1009715S1 (en) | 2021-07-21 | 2024-01-02 | Specialized Bicycle Components, Inc. | Bicycle frame |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: SCHWINN BICYCLE COMPANY, 1856 NORTH KOSTNER AVENUE Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:MUELLER, CLIFFORD F.;REEL/FRAME:004558/0785 Effective date: 19860513 Owner name: SCHWINN BICYCLE COMPANY,ILLINOIS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:MUELLER, CLIFFORD F.;REEL/FRAME:004558/0785 Effective date: 19860513 |
|
AS | Assignment |
Owner name: MELLON FINANCIAL SERVICES CORPORATION, 1 MID AMERI Free format text: ASSIGNMENT OF ASSIGNORS INTEREST. , SUBJECT TO CONDITIONS IN AGREEMENT RECITED.;ASSIGNOR:SCHWINN BICYCLE COMPANY;REEL/FRAME:004761/0031 Effective date: 19870804 Owner name: MELLON FINANCIAL SERVICES CORPORATION,ILLINOIS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SCHWINN BICYCLE COMPANY;REEL/FRAME:004761/0031 Effective date: 19870804 |
|
CC | Certificate of correction | ||
FEPP | Fee payment procedure |
Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
AS | Assignment |
Owner name: SCHWINN BICYCLE COMPANY A CORP. OF IL, ILLINOIS Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:MELLON FINANCIAL SERVICES CORPORATION AS AGENT;REEL/FRAME:005195/0821 Effective date: 19890215 Owner name: SCHWINN BICYCLE COMPANY, ILLINOIS Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:MELLON FINANCIAL SERVICES CORPORATION, AS AGENT;REEL/FRAME:005184/0034 Effective date: 19890215 |
|
FEPP | Fee payment procedure |
Free format text: PAT HLDR NO LONGER CLAIMS SMALL ENT STAT AS SMALL BUSINESS (ORIGINAL EVENT CODE: LSM2); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
FPAY | Fee payment |
Year of fee payment: 4 |
|
AS | Assignment |
Owner name: HARRIS TRUST AND SAVINGS BANK Free format text: SECURITY INTEREST;ASSIGNOR:SCHWINN BICYCLE COMPANY, A CORP. OF ILLINOIS;REEL/FRAME:005630/0882 Effective date: 19910228 |
|
AS | Assignment |
Owner name: SCHWINN BICYCLE & FITNESS LIMITED PARTNERSHIP, IL Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:SCHWINN BICYCLE COMPANY;REEL/FRAME:006430/0869 Effective date: 19921110 |
|
AS | Assignment |
Owner name: SCHWINN CYCLING & FITNESS INC. Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SCHWINN BICYCLE AND FITNESS LIMITED PARTNERSHIP;REEL/FRAME:006642/0574 Effective date: 19930715 |
|
AS | Assignment |
Owner name: CONTINENTAL BANK N.A., AS AGENT, ILLINOIS Free format text: SECURITY INTEREST;ASSIGNOR:SCHWINN CYCLING & FITNESS, INC.;REEL/FRAME:006671/0046 Effective date: 19930804 |
|
REMI | Maintenance fee reminder mailed | ||
LAPS | Lapse for failure to pay maintenance fees | ||
FP | Lapsed due to failure to pay maintenance fee |
Effective date: 19950524 |
|
AS | Assignment |
Owner name: BANK OF AMERICA ILLINOIS, ILLINOIS Free format text: RELEASE OF SECURITY INTEREST;ASSIGNOR:SCHWINN CYCLING & FITNESS INC.;REEL/FRAME:008215/0784 Effective date: 19961101 |
|
STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |